Wow what have you been feeding him!
he is one handsome cat!
It must be the French air and flies! We actually feed him Whiskas kitten with a vet recommended dried food, but he gets lots of fresh chicken and beef. Being the only cat he is spoilt rotten.
We went up to our barn today. We saw a stray cat a month back (too many here in france) who I thought was pregnant and YEP there she was lying on the grass with what looks like a belly full of kittens... So you never know Frankie may not be the only cat.