Well done! I‘m not sure I‘d have the courage to give an injection but then we don’t know what we’re capable of until the need arises. The important thing is, you‘ve made a start and I‘m sure things will get easier as Willows adapts to the routine and you become more relaxed about it.
Sorry if its a silly suggestion, I don’t have any experience of diabetes, but is she allowed any sort of treats which you could use as reward to make the injection positive? My dog has a weight problem and I give him bits of vegetables, e.g. carrots either slightly cooked in a bit of broth or water with a scrap of meat in , or put into a plastic bag with a bit of something tasty, that will add flavour. I cut tiny cubes as training treats for his physiotherapy but he gets larger pieces of carrot of cucumber or similar as a snack inbetween. It might just help as a distraction ?
Please don’t feel guilty, cockers are masters at looking at you and making you feel wretched, but you’re doing a great job and I‘m sure if you were able to ask Willow, she‘d be quite happy for you to gain your injecting skills on her, you‘re a team and she‘d want to help you as you‘re helping her.
Do keep us posted!
All the very best to you both!