I have an 8 month old bitch which is a little aggressive,she seemed to be getting better but just lately she has got worse?Could she be coming into season and could this make her like it ,she has been trying to mate with my leg like a dog which seems a little strange!

This is almost certainly due to her hormones working up to her coming into season. Perfectly normal (yes, even the humping!) - it would be sensible to press a clean white tissue against her vulva frst thing every morning so that when you see the first tinge of pink you know that she is in season and can keep her away from other dogs for at least 3 weeks.