Good advice.The external parasites may have gotten to your silkie, particularly mites from sucking blood, or the ivermectin you used on her is causing an adverse reaction. You never mentioned how much ivermectin you used on your silkie or other birds.
If you suspect your silkie is eggbound, soak her in a container of warm water up to her sides and gently massage her underside for about 20 minutes. The warm water will relax and expand her innards, massaging will help move the egg along. Then hopefully she'll lay the stuck egg, IF that's what the problem is.
I recommend that you hold off for about a month or longer before worming, you've given them enough chemicals for now (dust and ivermectin.)
Get yourself some latex gloves, KY Jelly and do an exam. Be careful, if she does have a stuck egg, you don't want to break it.
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