When I had a Japanese Maple--I can't remember which kind but it was a red one--I believe I used a product called liquid Sequestrene to feed the tree twice a year though some say once a year is plenty. It adds a bit of acidity to the soil which these trees love and which was needed in Kansas. I'm rememering that high nitrogen concentrations are not recommended for Japanese Maple but they do need feeding, though not frequently.
The neighbor had a beautiful Japanese maple that died when it came into contact with black walnut roots--as I said the Japanese Maple does not like competition from strong neighbors.
Japanese Maples love water and do not do well if they are under watered. Boomer will need to water her transplanted tree several times a week at least for the next year or so until the roots are firmly established.
Soz, if your tree is not doing well I would suspect under watering as a definite factor. Be sure it is well mulched especially around the perimeter during the winter--Ohio has cold winters, yes? (Don't bank the mulch against the trunk though.)
Cut any wilted, dying, dead branches from the tree.
Also look for insects and parasites. Japanese Maples are especially susceptible to aphids, nematodes, and spider mites, all of which can be controlled with a mild insecticide.
This makes it sound like Japanese Maples are fragile, but they really are a pretty hardy, low maintenance tree.