Well, it might depend on who you ask. And it may depend on how much you have to give your dog (or yourself) to achieve the desired beta-glucan levels.
I use and recommend from two companies. CBD Dog Health and Real Mushrooms. Yes, I know 4 Leaf Rover and other’s have options as well. But I belive these are the top 2. I also really love the tinctures to add easily to food or a direct shot in the mouth, or add the drops to a mid-day treat. This works very well for the small to mid-size dog. Not that they don’t work for big dogs – they do, the bottles are just pretty small! So to add a higher volume of beta-glucans I add the powders to food until it reaches such a point that it’s just to must “mud” for the dog to eat. So you may have to mix and match.
From CBD Dog Health:
With medicinal mushroom products for pets on the rise, it’s tough to know which one is right for your pet, so let me tell you what sets MycoDog apart:
Liquid Form: Mushrooms are 85% water, making a liquid tonic exceptionally bioavailable.
Synergy: Multiple medicinal mushrooms and adaptogens have been combined for a powerful, synergistic blend.
Sourcing: MycoDog’s mushrooms are wild-harvested at peak potency, grown on natural substrates found in their native habitats from the clean air and forests of the PNW.
Manufacturing: Crafted by true myco-alchemists using a spagyric extraction method for maximum purity and potency.
No Fillers: MycoDog’s liquid tonics preserve freshness in only organic vegetable glycerin; no harmful fillers or ingredients here.
Therapeutic Dose: Just one dropper full delivers a therapeutic dose so a little actually does go a long way.
Substrate: MycoDog’s fungi are grown on the same wood, decaying matter, and environment found in their natural habitat with sunlight!
See CBD Dog Health (Myco Dogs) Blog: https://shrsl.com/4i3dd
Full Affiliate list: https://linktr.ee/welloiledk9