I've been posting on the puppy thread but thought I would pop a post on here to see if anyone has been through something similar.
We have a 12 week old puppy and 3 year old dog. Pup has been fully vaccinated since Tuesday this week so we've been getting her out on the lead (rather than carrying her) and it's becoming apparent that she's very anxious. Pre Tuesday we did some socialisation in arms (school runs, cafes) and I did notice then that she would shake at times. She is heavy and initially hated the car so I perhaps didn't do enough socialisation before 12 weeks.
She shakes, whines and climbs up my leg in new environments and around new people, but she is most distressed by other dogs. We have been to puppy school and at the end of the hour she had started to relax, but she was too close to threshold for any actual training and was very wary of the other pups. The other puppies seemed much more relaxed than she did.
We had an incident today where a very over-zealous puppy wouldn't leave her alone and the owner was unable to recall him, she was clearly scared and crying out, I wasn't sure if I should pick her up, but she resorted to growling and snapping and the puppy then left her alone. I'm not sure how worried I should be about this at her age. I've spoken to the trainer from puppy school and I am going to increase the distance between her and other dogs, reward calm behaviour etc.
I'm just wondering if anyone else had a puppy like this, and if there is any chance it's a developmental phase?