Most synthetic cat toys are not going to hurt your cat today. The problems are slower than that, and they come in two kinds: bits that come off and get swallowed, and materials your cat spends years licking and chewing that were never tested for the purpose.
Natural fibre reduces both risks, and it has a second advantage that has nothing to do with safety. Cats simply engage with it more, because it feels closer to the texture of prey.
What counts as synthetic
Nearly everything in the pet aisle. Polyester plush and polyester fill, nylon cord, soft PVC, moulded ABS plastic, polyurethane foam, acrylic fur trim, and the glues holding the decorative parts on.
None of that is unusual in household objects. What makes cat toys different is how they are used. A cat holds a toy against its face, licks it, bites through the fabric, and does that for hundreds of hours over years. That is much closer to how a baby uses a teething toy than to how you use a cushion.
The risks that actually send cats to the vet
The mechanical problems are the ones vets see, and they are worth knowing in order of how common they are.
Swallowed fill. Once a seam splits, polyester wadding is exposed, and some cats eat it. Small amounts pass. Larger amounts can form an obstruction. Thin fabric with a single row of stitching is what makes this likely, since it is a matter of when the seam gives out rather than whether.
String, cord, and elastic. A cat's tongue is covered in backwards-facing barbs, so once a strand starts down the throat, spitting it out is very difficult. Swallowed thread can gather the intestine along itself, which is a serious surgery. Any toy attached to a thin cord should be a supervised toy, put away afterwards.
Glued-on parts. Plastic eyes, bells, pompoms, and feather trim. Glue is the first thing to fail on a cheap toy, and each of those parts is the right size to swallow.
Cracked hard plastic. Moulded balls and hollow toys split into pieces with sharp edges once they have been chewed and stepped on enough.
None of this is exotic. It is just what happens to thin synthetic construction over a few months of real use.
The chemical question, honestly
This part gets overstated online, so here is the accurate version.
Pet toys are not covered by the safety standards that govern children's toys. There is no equivalent of the testing regime that limits phthalates, heavy metals, and specific dyes in things designed for toddlers. A manufacturer can use whatever plastic and whatever colourant is cheapest, and nothing requires them to say what it was.
The specific concerns are soft PVC, where plasticisers are added to make rigid plastic flexible and can migrate out of the surface over time, and azo dyes on brightly printed fabric, some of which break down into compounds that are restricted in textiles for humans. Independent testing of pet products has repeatedly turned up lead and other heavy metals in a minority of samples.
That does not mean your cat's plastic mouse is poisoning it. It means nobody checked, and you have no way to check either.
The one shortcut available is to look for OEKO-TEX Standard 100 on textiles. It is an independent test of the finished fabric against several hundred substances known to be harmful, including the dye and heavy metal categories above. It is not an environmental label and it does not certify construction quality, but it is the clearest evidence you can get that what your cat is chewing was actually tested.
Why cats prefer natural fibre
Set the safety argument aside for a moment, because this is the part that shows up in how much the toy gets used.
A cat's decision about whether something is worth attacking is largely about texture. Prey gives way under teeth and claws. It absorbs saliva, it holds warmth, and it has a slight roughness that lets claws catch and grip.
Woven cotton does all of that. Teeth sink in slightly and meet resistance. Claws hook into the weave. It takes on the cat's own scent over weeks, which is why a favourite toy becomes more attractive rather than less.
Polyester plush behaves differently. It is slick, claws slide off it rather than catching, it sheds fibres when bitten, and it stays chemically inert no matter how long the cat carries it around. Hard plastic gives no feedback at all, which is why moulded toys get batted once and then ignored.
There is also a temperature difference cats notice. Cotton and wool sit at room temperature and warm quickly against the body. Plastic stays cool and stays cool.
Materials, roughly ranked
Good. Woven cotton and cotton twill, especially reinforced and double-stitched. Wool and wool felt. Hemp and jute. Sisal for scratching. Untreated solid wood for handles. Undyed or naturally dyed fabric.
Fine in the right place. Corrugated cardboard, which is cheap, popular with cats, and recyclable. Leather or suede lures on wand toys. Natural feathers, if sewn rather than glued, and only as supervised toys.
Worth avoiding. Polyester plush with thin single-stitched seams. Polyester fill. Soft PVC. Anything printed in bright colours where the dye is unspecified. Anything with glued trim. Carpet-covered scratching posts, which shed synthetic fibre and teach cats that carpet is fair game.
A thirty-second check in a shop
- Pull gently at a seam. If you can feel it separating, a cat will open it in a week.
- Try to twist off any small part. Eyes, bells, pompoms. If it moves, it will come off.
- Look for a named fibre. "Cotton" is information. "Premium materials" is not.
- Check for a cord or a loop. If there is one, it is a supervised toy.
- Squeeze it. If it holds its shape and feels dense rather than airy, there is real filling in there rather than a small handful of wadding.
When synthetic is genuinely fine
Not every plastic thing needs to go. A moulded plastic tunnel the cat runs through, a ball in a circuit track, an automatic laser unit on the sideboard: these are toys the cat does not put in its mouth, and the objections above mostly do not apply.
The material question matters for the toys a cat bites, licks, carries, and sleeps next to. That is a much smaller category, and it is the one worth spending money on.
What we build, and why
Le Croissant came out of this exact list. Reinforced cotton certified to OEKO-TEX Standard 100, double-stitched seams, hand-finished in small batches in Toulouse. No plastic components, no dyes, no glued-on parts, and nothing small enough to come loose. Inside is at least 30g of organic catnip buds and Silver Vine fruit rather than synthetic wadding with a pinch of herb for the smell.
The shape is part of the same argument. It is sized and weighted to be gripped with the front paws and kicked with the back legs, which is the play pattern that puts the most strain on a toy and the reason thin plush fails so quickly.