aww poor boy, dofo not normal, sum pups can come from mum with worms but the breeder has normaly already wormed the pups to reduse that risk.
the kennels cough go you you chemest ad ask for benylin chesty cough(do not say it is for your dog or they wont give it to you) give him a baby dosege. they vets cant give you anything more than an antibiotic which has no efect on the kennel cough it is only a precaution or treatment of any infaction that is a result of the kennle cough. its like the human flu, there is no treatment they can only threat things that happen as a resut of the kennel cough such as chest infectaions. normaly i would say leave it and let it run its course but because of his age its a good idea to keep getting him checked out by the vet if he gets any worse.
i work at a kennel and we are having a big problem with kennel cough, its not harming the dogs but its like the cold in a primaly school it spreads like wild fire.
the ears quistel is very good it was recomended to me be someone whos cockapoo has bad ear problems.
have you cantackted the breeder, have any of the litter mates had similer problems?