As a general rule (Islamic rule), mocking of people is not considered as a competent act (even regarding mocking of non-Muslim people).
So, for instance, it has mentioned in the holy Quran (a-Hujurat: 11) regarding mocking that:
يا أَيُّهَا الَّذِينَ آمَنُوا لا يَسْخَرْ قَوْمٌ مِنْ قَوْمٍ عَسى
أَنْ يَكُونُوا خَيْراً مِنْهُمْ وَ لا نِساءٌ مِنْ نِساءٍ عَسى أَنْ
يَكُنَّ خَيْراً مِنْهُنَّ وَ لا تَلْمِزُوا أَنْفُسَكُمْ وَ لا
تَنابَزُوا بِالْأَلْقابِ بِئْسَ الاسْمُ الْفُسُوقُ بَعْدَ الْإِيمانِ
وَ مَنْ لَمْ يَتُبْ فَأُولئِكَ هُمُ الظَّالِمُونَ (11)
O you who have believed, let not a people ridicule [another] people;
perhaps they may be better than them; nor let women ridicule [other]
women; perhaps they may be better than them. And do not insult one
another and do not call each other by [offensive] nicknames. Wretched
is the name of disobedience after [one's] faith. And whoever does not
repent - then it is those who are the wrongdoers. (11)
According to the view of Grand Ayatollah Khamenei (as a Marja'al-Taqlid of shia), it is not permissible (mocking…), and the right humans (humanity) ought to be observed and Muslims ought to control themselves from these affairs..
Of course in accordance with the ruling above, it seems that there mustn't be a problem is doing that for animals.., but we are not allowed to do that for the humans.