My husband and I assumed one of our cats "sprayed" upstairs in our third floor bathroom (converted attic). The smell has come back after two full floor washings with enzyme remover. The smell seems to be strongest under the bathroom sink. When we checked the adjoining kitchenette, it seems to smell under the kitchenette sink. They share a wall. Could this be a dead animal? It smells very musky, urine-like--hideous.

My husband and I assumed one of our cats "sprayed" upstairs in our third floor bathroom (converted attic). The smell has come back after two full floor washings with enzyme remover. The smell seems to be strongest under the bathroom sink. When we checked the adjoining kitchenette, it seems to smell under the kitchenette sink. They share a wall. Could this be a dead animal? It smells very musky, urine-like--hideous.
... with your plumbing venting. Try reposting in the Plumbing section.