ਅੰਡਜ ਜੇਰਜ ਉਤਭੁਜ ਸੇਤਜ ਤੇਰੇ ਕੀਤੇ ਜੰਤਾ ॥
ਏਕੁ ਪੁਰਬੁ ਮੈ ਤੇਰਾ ਦੇਖਿਆ ਤੂ ਸਭਨਾ ਮਾਹਿ ਰਵੰਤਾ ॥੩॥
The beings born of eggs, born of the womb, born of the earth and born of sweat, all are created by You.
I have seen one glory of Yours, that You are pervading and permeating in all. ||3|| - 596/15 - Guru Nanak Dev
The blog contain textual material from Guru Granth Sahib, Historical Books of Sikhism and Lecture of Sikhs on said topic.
Guru Har Rai also go for Hunting expedition - Mahima Parkash
In Sakhi 4, Mahima Parkash covers this fact that Guru Har Rai j. Same source also suggests that Guru Har Rai ji was Vegetarian by Diet and also stopped cooking Animal Food in Langar, i.e till first 6 Gurus Animal Food was part of Langar Sahib. After this Guru Gobind Singh and Khalsa is shown as taking Animal Food as diet. Though he is shown as animal lover but he go for Hunting Practice also.