There is a new dog three houses up. But his garden has a secure fence between their garden and the field. Beau is also a very well-behaved dog who rarely barks, so Kizzy probably does not know he is there. Oh just thought, Beau goes for a walk with his owner, and they walk round the field, along the "path" that Kizzy follows for some distance.
The huge Labrador next door was very old, and died a few weeks back.
The cat immediately next door is not out very much except when her staff are in the garden.
The other new cat is an "indoor" cat. The only suspect is Monty, the very large (mostly fluffy fur and big tail) that has moved in opposite, with his two staff, of course. He could be causing the problem, not sure. I have no idea how to draw a map and post it here.
As far as possible, I try to make sure that the cats are out at different times, so Bob can have some peace and quiet. Sometimes I think it is because Kizzy thinks Bob has eaten "her" biscuits/dry food, but usually it is the other way round. Yes, Kizzy is fairly round,
which is why she needs to be outside more often.
Do cats have err.... hormones like human beans do?