Thank you to Aminah for sending this link about MUIS' views on animals. It was very enlightening.
I am very glad to see that MUIS is supportive of sterilisation of animals, and promotes kindness to animals. However I was disappointed to see that they mentioned that if an animal causes conflict in the family, it is permissible to kill it. Aminah, who is Muslim herself, was quite disturbed by this and sent in the link, urging everyone to write to MUIS.