I have seen a few brands of Type 2 collagen in a pill form contain chicken collagen. Regarding taking pills, I have asked 2 local rabbanim who agreed with this general rule:
Preferably, one should take a pill having kosher ingredients. If one cannot find a pill with kosher ingredients, and taking the pill is necessary for a life-threatening condition, one may take a non-kosher-ingredient pill.
I have also understood that only kosher meat comes under the category of "fleishig" with regard to having to wait after eating it and eating dairy. If one ate non-kosher meat, it is not considered fleishig. (I don't recall where exactly I had heard this; probably in my yeshiva many years ago.)
My questions - Does the above rule apply to taking pills, assuming it was kosher chicken collagen? Does it make a difference if the pill has a flavor and is chewable or not? (I.e. - are the rules of "fleishig" applicable in non-achila cases?)Does it matter if the amount of collagen is less than 1/60 in proportion?