I'm not sure any will make a great difference but I did see advertised recently a shampoo which contained baking soda and it was supposed to keep smells at bay for longer. This ones called Oatmeal 'N Baking Soda by Lambert Kay Fresh n Clean. Provides odour control whilst soothing dry, itchy skin. I order things from USA as live in NZ but I should imagine any shampoo with baking soda in it will be the same.Also do a conditioner.
How about an in between baths spray? Fresh n Clean do a grooming spray which deodorizes, tearless formula and doesnt interfere with flea and tick stuff. Just spritz and go!!!
I havent got shares in it honest! Just reading from the catalogue. Hope this helps.