Hi, I have a jack russell bitch, she will be 10 years old in December, I have had her since she was 7 months old. She's usually a very friendly animal but creates a fuss when people leave / enter the house but never viscious. I am due my first baby in December, not long started maternity leave. My dog is getting far more attention than usual because I am at home more to spend the time with her. This week she has become aggressive towards me. When I left the house to go to the shop on Tuesday night, she jumped up, bit my leg which thankfully she didn't draw blood on but left me bruised. She was defiant and would not do as she was told in terms of getting into the kitchen where she is left when we go out. Then, this evening, my friends children who have spent the afternoon here came to leave with their parents and we had the same problem. This time she jumped up and bit my finger, luckily again, I pulled it away in time for her not to cause me any serious damage. She is currently locked in the back yard as punishment but I'll be letting her in after I have typed this simply because it is very cold and I feel cruel. She suffers with collitis and has done for a few years now, is on a prescription diet from the vet and this week has had a rumbly tummy which I'm taking her to the vet for tomorrow. Also, the last couple of months she's started whining due to pain in her back legs that the vet said is king of arthritic. This is happening more frequently. Could this behaviour be her way of telling me she is in pain, or am I trying to make excuses for her naughty behaviour? Could it be she knows the baby is on its way and is warning me she's not happy? By the way, just had a thought she has started barking persistantly when my partner shows me any affection just recently which may just be a coincidence but I wonder if that's anything to do with it too? Please help! Any advise will be considered. Thanks in advance.