✔ 最佳答案
狗狗打了心絲蟲針不會不良反應. However, need to ensure 狗狗 has NOT already infected by 心絲蟲.
建議打 or 食藥.
打針 is once a year.
I feel 1 dose per year is too strong for 狗狗 in the beginning, and too weak at the end. Only my feeling, not scientific.
食藥 is monthly.
I prefer 食藥. In fact, 狗狗 likes the taste of 心絲蟲藥. No problem to feed 狗狗.