Cat Bed Warmer Heated Cat Bed Or Pad - What To Avoid?

Heated Cat Bed or pad - what to avoid? - cat bed warmer

My vet suggested today announced that I have a blanket or a warm bed for my sick cat kittens 9 months. This is to discourage the search for warm places that are dangerous for them. There are many models, prices, styles and textures. I know I want to cover the UL-listed and washable. Can you tell me what to textures, which I do not know them to be avoided?

Details: We have had since birth to eat and your mama cat. There is a lack of growth of kittens (3 months, to a current 9 months). We managed to get rid of scabies, finally. Seems they are still immune system disorders, and now a heart murmur, it seems cold.