i like this answer!
The answer is really quite simple. There is no fish...the bird ate it and then since it had a full stomach, couldn't escape when the cat came along which in turn ate the bird. Since the cat needed to wash it down, it went to the middle house for some milk but I think the dog was somewhere nearby so it jumped on the cat and tore it to bits. Since the Swedish man freaked out when he saw what his dog was doing (he'd been drinking and smoking too much at the time), he jumped on what he thought was his horse, but which in fact was one his neighbour's, and he took off. Of course his neighbour wasn't very happy with this so he set fire to the Swedish man's house which consumed all the evidence. So there is no fish or remains anywhere.