I have two 2-year old Honey Berry plants that are in a partial son to shaded area. I mulch them with shredded hardwood and apply a 10-10-10 fertilizer in the spring. They had their first blooms this year, but no fruit. They look good. The yellow leaves may mean over-fertilization. Have you checked the ph? They tolerate a wide ph range, 4.5 - 8.5. Most likely it's sun/wind scald; many cultivars of honeyberries, especially the early blooming ones, naturally experience browning and dropping of leaves in mid-summer. Honeyberries benefit from shade from the hot afternoon sun.

Carolina horsenettle? Here is a link that might be useful: Solanum carolinense

It is a variety of Duranta, it sprouts pretty easily from seed but the fruit is said to be noxious. I picked fruit from a purple flowered variety in Florida and once it got warm here sprouted the seeds, makes a nice house plant in the north.

I have a lot of a Symphoricarpos that has violet berries. It's pretty but I have never seen a bird eating the berries. They just dry up and fall off. The best berry I have is a Silky Dogwood. I don't remember the scientific name right now. It has attractive, blue berries with a greenish overtone. The leaves turn red in the fall. The only drawback for me is that it's branches lean over and root where ever it touches the ground so we have to keep it trimmed back. But, it's worth every minute of the time we spend on it. So far, these are the birds I've seen eating the berries: Rose-breasted Grosbeak, Scarlet Tanager, Brown Thrasher, Catbird, Black-throated Blue Warbler, Black-throated Green Warbler, Tennessee Warbler, Orange-crowned Warbler, Yellow-rumped Warbler, House Finch, Song Sparrow, Swainson's Thrush, Wood Thrush, Robin and probably some I'm not remembering. These shrubs grow along the creek and to think, we almost got rid of them all when we first moved here!! I am SO glad we didn't! VG