I used to mix steamed bone meal, blood meal and ashes as my attempt at a balanced and "high power" organic fertilizer.

Applying ashes directly to the garden without a soil test turned out to be not a good idea here. Potassium and pH are quite high and a little experiment on half a bed of onions really impeded their growth. Still, ashes may discourage your dog and may be fine for your soil.

I stopped doing anything with blood meal not only because I decided I shouldn't mix ashes with it but because the stuff I could buy was so dusty! I suspected that it just might be too risky to my health.

There are commercial organic fertilizers that use ingredients that include blood meal. I have used those in my garden. Oh, and the ashes: I decided that after sitting for a couple weeks in a metal bucket, they could go in my compost. I no longer have a wood stove, however.

Steve