Hello everyone, so our supposed to be a house cat has been desperate to go out. Crying at the door and running towards it whenever we go to open it, so we decided to see how he would get along outdoors - he's 8 months, neutered and has had injections. He only went into the next doors garden and played in the grass and laid in it whilst its been hot. Last night at about 8:30 off he went again to the neighbours grass and we heard a cat comotion, he ran back inside and since then has been hissing at us when we go to touch his stomach/pick him up. He's pretty much just wanted to be left alone. He's eaten and used the litter tray. I rang the vets but they had no appts left for today and said to call back at 9am tomorrow. I can't see any injury on the outside of him though. Any kind words to make me feel better about my poor boy😔