Anyone heard of Dinovite?

I have heard of it. I have not used it.

There is a lot of hype on their site. It reads like an infomercial. Call me a skeptic, but I don't trust claims like "Why not feed him a natural supplement containing everything he needs to be healthy and happy?"

*I* prefer to supplement with individual items as necessary. It's easier to control amounts and to be sure of freshness. It's also possible for dogs to be allergic to kelp and other ingredients in mixes like these. Individual supplementation helps you to know what exactly your dog reacts to.

That said, if you feel like you've tried everything else and you've heard good recommendations, why not try it?

Have you consulted a veterinary dermatologist? Or, if there is a vet school in your state you may be able to get skin testing done cheaper than a specialist.

Welcome to idog;
 There are other antihistamines you can try besides Benedryl; here is a link with kinds you can try and dosage by weight of the dog;    [linkhttp://www.utskinvet.org/pdf/antihists.pdf]http://www.utskinvet.org/pdf/antihists.pdf[/link]
 
You need to try each one for about two weeks to know if it will help; Tavist worked best for Jessie of the OTC antihistamines. For your dog's feet, try making some strong black tea, a few bags to a cup, and putting it on her feet twice a day; you can use a spray bottle or dip her feet in a bowl; one member has her dog lay outside in the grass and uses a squeeze bottle. It may sound strange but it works and helps the skin to heal. Jessie used to chew and lick her feet until they bled and get nasty infections between her pads and her toes; in order to prevent her from chewing on them when I couldn't watch her I'd put doggy boots on her feet because she hated the E-collar. I used MuttLuks because they really stayed on good; I got them at PetsMart.
   If she's chewing and scratching other parts of her body bathing with a dog shampoo for itchy skin helps; many members have used Nova Pearls and NuSal-T and found they help; you may have to order NuSal-T online. PetsMart sells a conditioner called OxyMed that really helps calm itchy skin; it is made by Tropiclean and has a blue cross on the bottle.
   If you are interested in consulting a veterinary dermatologist some of us have been to them and can answer questions you may have about what they can do and what it may cost. It's great to have you on the forum and I hope we can help.