Veneers on Just Canine and First Bicuspids?

If the issue is simply size, shape and color, veneering only a few teeth to match is likely not a problem.  It may be a challenge and require additional lab work and lab communication,  but it should not be a problem.

I would suggest a diagnostic wax up before you begin to determine if the new shape is to your satisfaction. 

It's absolutely possible.  As a matter of fact, I used to just have veneers on my bicuspids only in my mouth (4).  Porcelain is the best material we have in dentistry in terms of mimicking nature.  It can absolutely be done and done so that you can't detect which is a veneer and which is a natural tooth.   

Canines are thick teeth and always look a little yellower than the front 4 teeth. Bonding on these teeth will turn yellow or darken over time and you'll never be happy with them...Porc. veneers can be made very white to match the other teeth and will stay white because they are made from glass...

Once you have found a great cosmetic Dentist, have them wax up your canines and bicuspids on a model to get an idea of how you will look.  If you are happy with the results you should be very happy with your new veneers.  This is not an uncommon situation.  This will easily address your color issue and you should get many years out of a beautiful smile!  Good Luck.

Absolutely veneer your canine and bicuspid teeth if the 4 front teeth look good and you need to close space, change color or correct the alignment of these teeth. Interview and choose a good solid dentist who is clear about your expectations.