Answered by Mufti Yusuf Mullan
Cats and purchasing pet food that contains un-Islamically slaughtered meat: is it allowed?
Wa alaikum salaam,
It is haram to buy this cat food. The prohibition against buying or selling unislamically slaughtered meat (maytah), for the reason mentioned in the question i.e. its having no property value is established through absolute textual proof. There is scholarly consensus on this issue.
For an alternative to commercially sold pet food, visit http://www.pet-grub.com/ and other similar web-sites. Simply use islamically-slaughtered meat when preparing the meals.
It means caged.
And Allah knows best.