I'm sure Domino's still acts odd when it would have been her season although she's been spayed for 6 years. The vet says it's impossible because they take everthing away, but I'm not convinced. She tries to escape from the garden and is just particularly naughty, and then it seems to go away. She does get a bit worried when suitcases appear too, so it could be just that.
Hope you have a lovely week.