A bit unclear this question but Sikhs eat all kinds of food from vegetarian to meat. Sikhs cannot eat Kuttha meat or meat which is ritually killed like Halal or Kosher.
In the Rehit Marayada (http://www.sgpc.net/rehat_maryada/section_six.html), Section Six, it states:
The undermentioned four transgressions (tabooed practices) must be avoided
1. Dishonouring the hair;
2. Eating the meat of an animal slaughtered the Muslim way(Kutha);
3. Cohabiting with a person other than one's spouse
4. Using tobacco.
Sikh Rehit Maryada
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