Supplication when buying an animal:
اللّهُـمَّ إِنَّـي أَسْـأَلُـكَ خَيْـرَها، وَخَيْـرَ ما جَبَلْـتَهـا عَلَـيْه، وَأَعـوذُ بِكَ مِنْ شَـرِّها، وَشَـرِّ ما جَبَلْـتَهـا عَلَـيْه
“O Allah, I ask You for the goodness within her and the goodness that you have made her inclined towards, and I take refuge with You from the evil within her and the evil that you have made her inclined towards.”
Transliteration: Allâhumma innî as’aluka khayrahâ, wa khayra mâ jabaltahâ calayhi. Wa acûdhu bika min sharrihâ wa sharri mâ jabaltahâ calayhi.