@ JUSTICE HUGO ...
Just an unsolicited advice for you , he didnt ask for VITAMINS being used by forumers here because he will use it also . Its only a reference and a guide . Next time , if its something that doesnt do any good or provide help , just lurk . By the way , GOOGLE might provide ANSWERS but it doesnt say if its RIGHT or WRONG .
To TS ....
Two things to start with . When we say BEST VITAMINS , there is no such thing because being MICRONUTRIENTS , they provide different kinds of benefits . In my case , I give my dogs VIT C and B COMPLEX VITAMINS intended for adults . Prescription would vary depending on the weight and te condition of the dog . I am not an authority here iin prescribing so its best to consult your vet .
Now on the second part , what are the best brands ? I have used CEELIN for the VITAMIN C with ZINC and PET TABS and I dont have problems with it .