Dog spins in yard chasing dirt
We rescued a beautiful female german shepherd 3 months ago. She spends a tremendous amount of her time outside pawing up dirt and spinning around trying to catch it. Because of all of this (I assume nervous energy) she is not gaining weight. She eats about 6 cups of high quality food a day and we have taken to feeding her "satin balls" to help supplement her food intake. Took her to the vet and she doesn't have worms or any other parasites. Blood tests show no abnormalities. I just got laid off from my job and can't afford a lot more tests. Why won't she gain weight?
Someone please help with some advice.