(a) It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "A woman who has reached puberty and a dog (by passing in front) break the prayer."
(b) Imam al-Bayhaqi (may Allah have mercy on him) says: It is established from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that this does not invalidate the prayer, but it is disliked, and that by "breaking" invalidation is not meant.
Yahya (al-Qattan) said: No one narrated this hadith from Qatadah as marfu' (attributed to the Prophet) except Shu'bah; Ibn Abi Arubah and Hisham narrated it from Qatadah as mawquf (the Companion's own words).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3486