Related for Challah 1:8
עִסַּת הַכְּלָבִים, בִּזְמַן שֶׁהָרוֹעִים אוֹכְלִין מִמֶּנָּה, חַיֶּבֶת בַּחַלָּה, וּמְעָרְבִין בָּהּ, וּמִשְׁתַּתְּפִין בָּהּ, וּמְבָרְכִין עָלֶיהָ, וּמְזַמְּנִין עָלֶיהָ, וְנַעֲשֵׂית בְּיוֹם טוֹב, וְיוֹצֵא בָהּ אָדָם יְדֵי חוֹבָתוֹ בְּפֶסַח. אִם אֵין הָרוֹעִים אוֹכְלִין מִמֶּנָּה, אֵינָהּ חַיֶּבֶת בַּחַלָּה, וְאֵין מְעָרְבִין בָּהּ, וְאֵין מִשְׁתַּתְּפִין בָּהּ, וְאֵין מְבָרְכִין עָלֶיהָ, וְאֵין מְזַמְּנִין עָלֶיהָ, וְאֵינָהּ נַעֲשֵׂית בְּיוֹם טוֹב, וְאֵין אָדָם יוֹצֵא בָהּ יְדֵי חוֹבָתוֹ בְּפֶסַח. בֵּין כָּךְ וּבֵין כָּךְ, מִטַּמְּאָה טֻמְאַת אֳכָלִין:
Dough for dogs, as long as shepherds would eat from it, is obligated in <i>Challah</i>. And one may make an <i>Eruv</i> [enclosure of shared space via shared food to permit carrying on Shabbat] from it. And one may enter into a <i>Shittuf</i> [a partnership of space for the sake of carrying on Shabbat] with it, and one recites the blessings [before and after eating] over it, and one may invite to <i>Zimmun</i> [calling those who have eaten together, minimally three, to join together for the after-meal blessing] over it, and one may cook it on a Festival, and a person may use this dough to fulfill their obligation on Passover [of eating <i>Matsah,</i>]. If the shepherds would not eat from it, it is not obligated in <i>Challah</i>, one may not use it for an <i>Eruv</i> or enter into a <i>Shittuf</i> with it, and one does not say the blessing over it, and one does not one say the <i>Zimmun</i> over it, and it may not be cooked on a Festival, nor does one fulfill his obligation with it on Passover. In either case, the dough is subject to <i>Tumat Okhalin</i> [the ritual impurity affecting food].