I’ve also got a roughly 5 year old Jack Russel here, the dog is a complete arsehole. A few years ago he had a fight with one of my patterdales through the kennel bars and basically chewed his nose and half his top jaw off so the poor patt had to be shot. In more recent years he took a dislike to one of my spaniels (a dog) and would latch on to him every time he walked past! Eventually he gave up on him and took a dislike to my bull x lurcher, luckily for this Jack Russel the lurcher is in his senior years, if this was a few years ago he’d of just picked the little tw*t up, given him a good shake and made damn sure he never did it again!!
Said Jack Russel had his nuts off about 18th this ago…made sod all difference!