SanFelice wrote:

I planted some vegetables (tomatoes, zucchini, peppers, eggplant) and
put a cup's worth of dried hen compost in each hole prior to planting.
The plants were all about 8-12" tall at the time of outside planting.

Now, 10 days later, there has been no visible progress and some slight
yellowing of the leaves.

What should I do now? Take them out and re-pot for a short time while
I till the soil?

Any suggestions? tia

Compost is not the same as manure. What you did would have been perfectly
acceptable with compost ... and quite possibly fatal with the manure.

Depending on the transplanting conditions (intensity of the light and how
long exposed to it, general health at transplant time and so on), it is not
uncommon for transplanted stock to be 'set back' for a short time. Most
likely this is all that is happening here.

Still, concentrated, uncomposted, manure of any sort (dried manure is not
necessarily composted manure) in direct contact with roots is not as good
an idea as it might at first seem.