Haven't spoke to the vet about it, but glad i asked if it's toxic to cats! I would have checked it though before i gave him it. I don't think i will bother with either of them because he is recovering well himself.
He was hit by a car on Christmas eve, it's in another post here..'broken tail/truamatic tail'
The family member who recommended them, knows a lot of vets and she says they dont advise people to use them, becaue its not their field, but that they know they can be beneficial.
He is recovering well himself though, so i think i will just let him recover naturally.