How long are you walking him for?
At his age he should only be walking for about 20 minutes at a time.
Perhaps he is being walked for too long and over stimulated which then results in the biting.
My little one is only 3 months now and I am being quite strict about his walking (especially in the present heat). I walk him on his own and walk my one year old separately as they have different exercise requirements and each needs separate time with me. His walk is more to do with experiences and socialization.
Only walking for a short time is quite restrictive when you want a long walk. When i do take the dogs together for a long walk, I go with someone else and carry the little one for most of the walk (which is getting harder as he already weighs 6 kgs and that weight seems to increase the longer I carry him
) Having someone else with me means we can share the ‘burden”
I agree with the other posters, he sounds a very ‘normal’ cocker spaniel but they all differ. My one year old Maisie was a horrid puppy, very bitey, feisty and if you told her ‘no’ would answer back
. She was very challenging but she in now one and started to improve at about 9 months and now can be very loving especially now as she is just in her first season. . She is still feisty but that is just her personality. My little boy on the other hand is the prefect pup, calm chilled but responsive. He’ll settle himself anywhere
I feel I earnt him somehow having coped with Maisie