small lumps on his neck?

Diesel is 8 months and he appears very healthy, but he does have a couple of small (smaller than peas) lumps on his neck/back. i though they might be from his inocculations, but i alo thought they would have gone down by now. they are hard to the touch and are'nt painfull to him. i cant see them without parting his coat but when i rub his neck and stroke him i feel them. they dont look brightly coloured maybe pink if you have touched them a bit. also he is quite flaky at the moment when i groom him. btw he is sbt x am bulldg.

If any one hs any thoughts please let me know, i will be taking him t the vets next week anyway.

many thanks advance

Dan (and Diesel)