Is there a minimum age for having intercourse with a female slave?

Can someone please verify these quotes which are alleged to be taken from Chapters on Marriage and Divorce . It seems that from these quotes, there is no minimum age for having intercourse with your female slave. > I heard Aḥmad asked about an istībrāʾ for a girl of ten, and he > thought there should be one. I heard Aḥmad say, “A girl of ten years > of age may become pregnant.” Someone said to Aḥmad while I was > listening, “Even if she is too young to menstruate (ṣaghīra)?” He > said, “If she is [very] young, that is, **if she is still suckling**, **then** > **waiting an istibrāʾ has no legal consequences.**” > > Chapters on Marriage and Divorce Chapter 2 (Abu Dawud) §59-§61 > > I said, “What about a man who buys a female slave not old enough to > menstruate?” He said, “He abstains from having sexual intercourse with > her for three months.” ... I said to my father, “May he have intimate > contact other than that of sexual intercourse with his prepubescent > female slave?” He said, “Not until he has abstained from having sexual > intercourse with her for three months.” ... I asked my father about a > man **who buys a female slave who is too young to menstruate. “How long** > **should he refrain from having sexual intercourse with her?” He said,** > “For three months.” I said to my father, “What about intimate contact > other than that of intercourse? Can he, for example, touch or kiss > her?” He said, “I prefer him not to do that. He should wait an > istibrāʾ, for I cannot be certain that if he does touch or kiss her > and she is pregnant, he will not do so in an unlawful manner.” > > Chapters on Marriage and Divorce Chapter 3 (Abdullah) §138-§139 > > I said, “Sufyān said, and he was one of those among the scholars (ahl > al-ʿilm) whose opinion was sought, that when a man bought a young > female slave, **one considered too young for sexual intercourse, that it** > **was not necessary for her to wait an ʿidda.** He said, **‘What I prefer** > **when a man buys a female slave too young for intercourse is that her** > **new owner should neither kiss her nor have sexual contact with her,** > **until he has waited a period of istibrāʾ on her behalf, in accordance** > **with the sunna [concerning female slaves]**.’” Aḥmad said, “What Sufyān > said is excellent.” Isḥāq said, “There is no harm in his kissing her > and having sexual contact with her, because she is among those whom > one need not fear having to return to her previous owner because of > pregnancy. > > Chapters on Marriage and Divorce Chapter 3 (al-Kawsi) §224