yes, naturally occurring trans fats in fresh animal foods are ok in moderation.
it's the hydrogenated trans fats that are made by chemists that are bad for you. these are totally avoidable and should be.
you need a balance of mono, poly and saturated fats (of which naturally occurring trans form a part).
Essential fatty acids are most important as our bodies don't produce these ... ie mainly Omega 3 and Omega 6 in a good ratio - best sources are oily/cold water fish. Veg sources like flax and walnuts also good but fish is better for absorption etc.
Generally speaking for avoidance is to avoid:
- processed foods (mostly produced with hydrogenated vegetable oils and tallows ie bad trans fats) - this includes margarines
- vegetable oils high in omega 6 EFAs as these can throw the balance out for your EFAs. This includes canola, rapeseed, sunflower, safflower, corn, rice bran oil etc.
To have:
Olive oil is good, fresh butter is good - organic, grass fed better, coconut oil, avocadoes, nuts and peanuts, etc.
Lard and animal fats are good but if you want some real CLA content, try to buy organic meat from grass fed animals as the CLA content is much higher, plus eggs, dairy.
Most importantly, you don't need a lot, although how much you need in your daily requirement also depends on the type of diet you are following (eg more fat in keto/low carb etc).
Don't feel guilty about eating the chicken