ACLY and Thrombocytopenia: Frequencies of aPC, and aPS appeared higher in severe thrombocytopenic dogs (Group IA and Group IB) than in less severe thrombocytopenic dogs (Group IC) whereas frequencies of aCL and aβ2GPI were higher within thrombocytopenic outpatient dogs than in those without thrombocytopenia (Tables 2 and 3).