[princesspiggy]

i spoke to the vet that said the white worm er is more affective than eney other so sheep and chickins get it £10 to do the lot.

our vet told us to use it on pigs too,

[Welshcob]

My bad neighbour killed his dog that way - gave it Panacur along with the flock, forgetting he had included a flukicide, which turned out to be also a canicide     One dead dog 

i cant rem which one but there is a hors wormer which is fatal to dogs aswell.

Anything containing Ivermectin is harmful to Collie breeds and their cross-breeds. It crosses the barrier to the brain and causes great damage there, possibly death. I think that they might have made a product of the same class that is supposed to be safe for them, but I still don't like to use it. I have also heard to be careful with it when treating Dobermann and Pinchers. 

Also permethrin is fatal to cats. Many dog flea/tick products contain that, and making the mistake to treat the cat with the same product will kill it    

[Bramblecot]

If I use flea spray in the house/kennels will that be dangerous for the cats?  They are mainly outside but can get indoors or the kennels.  All the dogs and cats are treated with Frontline but I was spraying permethrin to keeps the moths out of the carpets.

[Welshcob]

It depends if the cats have a habit of spending a lot of time where permethrin (or similar compounds) have been sprayed.
As far as I know, it will be very toxic if the cat was sprayed and then washed itself. By licking it off their fur it is absorbed by mucosae and will cause the symptoms of toxicosis. However if they only go through an area where it has been sprayed, as long as they don't sleep in there/stay too long it should be ok. Those type of product are slowly absorbed through the skin so a short time shouldn't harm.

But if I were you Bramblecot I'd stop using those anyway, and dispose of the empties. You never know if a bottle is misplaced/loses the label, or if you delegate to flea the cats to somebody else, there are endless possibilities better not to think of. I always advocate for better safe than sorry!!
I'm sure there are other products that are cat-safe that could be used for moths and other pests.