Answer
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
It is impermissible to kill animals for training purposes since it involves torture and offence; however, we can use other targets which are set for this kind of training.
Answering your question, the General Iftaa’ Department in Jordan, states the following:
It’s impermissible to torture animals for any reason. `Abdullah Ibn `Umar reported that Allah’s Messenger (peace be upon him) said: “A woman was punished because she had kept a cat tied until it died, and (as a punishment of this offence) she was thrown into the Hell. She had not provided it with food, or drink, and had not freed her so that she could eat the insects of the earth. (Al-Bukhari)
In addition, the Prophet (peace be upon him) said:” Verily Allah has prescribed ihsan (proficiency, perfection) in all things”. (Muslim)
Moreover, killing an animal for a purpose other than lawful hunting is impermissible, since it was reported that Ibn `Umar said: “The Messenger of Allah cursed those who take anything that has a soul as a target.” (An-Nasa’i)
Imam An-Nawawi said:” Do not take a living animal as a target. The above mentioned Hadith forbids such an act because it is an animal’s torture and a waste of its benefit” (Sharh Muslim)
Therefore, it is impermissible to kill animals for training purposes since it involves torture and offence; however, we can use other targets which are set for this kind of training.
Almighty Allah knows best.
Source: https://www.aliftaa.jo/Question2En.aspx?QuestionId=3187